First, you must have an existing managed solution installed on your instance.
Staging solutions only works on managed solutions.
When you try to import a newer version, the import wizard will prompt you for a staging option. In this example, we will start with the Packt managed solution V0.0.0.1, and then try to install V0.0.0.2. The latter version will have some components removed.
From a security perspective, we will require a System Customizer role or higher in order to import solutions.